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I'm trying to figure out how to set up a double opt-in sequence. I see little to no documentation in the interface. I also tried youtube and didn't see much there either.
To set a list as 'double opt in', click into the list you want to set as 'double opt in', then click 'Settings' at the top. You can then set the list as 'double opt-in' in the list settings.
Thanks Ben. I found it.